Indexing mechanism.



No. 782,240. PATENTED FEB. 14, 1905. B. M. W. HANSON.

INDEXING MECHANISM.

APPLICATION FILED 110V. a, 1903.

2 SHEETS-SHEET 1.

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No. 782240. PATENTED FEB. 14, 1905. B. M. W. HANSON.

INDBXING MECHANISM.

APPLICATION FILED NOV. 9, 1903.

2 SHEETS-SHEET 2.

No. 782,240. Patented February 14, 1905.

UNTTED STATES ATENT FFTcE.

BEXGT .\l. \V. HANSON, OF HARTFORD. ()ONNEO'llCU'l, ASSlGNOh TO PRATT A:WHITNEY OOBIPANY, OF HARTFORD, OONNl XfllUlIl, A (ORPORATION OF N FillJERSEY.

INDEXING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 782,240, dated February14, 1905.

Original application filed July 12, 1902, Serial No. 115,837. Dividedand this application filed November 9, 1903. Serial No. 180.319.

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Be it known that 1, Elmer M. \V. HANsoN, a

and Fig. is a detached perspective view of the device for actuating theindeX-detent.

citizen of Sweden, residing at Hartford, in the Like numerals designatesimilar parts county of Hartford and State of Connecticut, 1 throughoutthe several views.

have invented certain new and useful Improvements in indexingMechanisnnof which thcfoli lowing is a specification.

This invention relates to indexing mechanism and is shown applied to aspiral millingmachine of the character set forth in my 4 applicationfiled July 12, 1902, Serial No. 115,337, of which the present case is adivision.

Primarily the objectof the invention is the provision of improved meansfor indexing the work-carrying spindle, and in this connection it is tobe said that although my invention is shown applied to a machine of thekind above set forth it is not limited to such use, being capable ofgeneral application to various machines in the metal-working and otherarts.

A further object of the invention is the provision of a work-carryingspindle, an indexing-ring rigid therewith, a lever having a deviceadapted to engage said ring, said lever being pivoted to the support forthe spindle, and means for actuating the lever.

A further object of the invention is the provision of a rotary spindle,a tubular spindle mounted within said rotary spindle, a notchediinlexringsecured to the tubular spindle, and means carried by the outerspindle for engaging the notches of said index-ring, and thereby lockingthe inner spindle after it has been indexed.

Further objects of the invention will be given in the detaileddescription, which now follows.

in the accompanying drawings, Figure 1 is a side elevation of a type ofmetal-working machine to which my invention may be applied. Fig. 2 is alongitudinal vertical section of the inner and outer tubular spindles,showing a part of my invention. Fig. 3 is a Referring to the drawings,the numeral 5 designates the frame or bed of the machine, which may beof any suitable construction, (3 a l1Btt(l-St()0l(,t1lltl T atail-stock, the latter having the usual deadarcnter S. Journaled inbearings of the head-stock (3 is a tubular spindle 9, having a flange orcollar 10, provided with an inclined inner face Fit-ted within thespindle 9 is a tubular chuck-spindle 11, provided with a head 12, saidhead having an inclined surface 12 litting against the complementalincline 10. A pulley 13 may be employed for driving the spindle 9, andclutch-and-gear mechanism similar to that disclosed in my applicationaforesaid may be used in connection with said pulley 13. These detailsconstitute no part of. my present invention, although theclutch-actuating lever thereof is designated by 11. Fitted in a recessof the head 12 and just forward of the collar 10 is a notched index-ring15, said ring being secured in the recess by a key 16 and being heldagainst displacement longitiulinally of the spindle by a collar 17,threaded upon said spindle and bearing against the ring. as shown inFig. 2. In the chamber at the forward end of said spindle is fitted acommon form of chuck lb, which may be compressed upon the work by a cap19 in threaded connection with the head 12. index-ring is provided witha series of notches 20, spaced at the desired distance apart.

Pivoted at 2i on the flange ll) of spindle 9 is a lever 22, having adetent 22' at its end remote from the pivot, said lever being slotted at23 for a purpose hereinafterstated. Journaled in a transverse bearin 2Aof the flange or collar 10 is a short shaft 25, having a circular groove25, said shaft carrying at one end a crank or wrist-pin 25 and at itsopposite extremity a lever-arm or handle as. To permit free rotativemovement of this shaft 25 transverse section on line 3 3 of 1. Fig. atis a transverse section on line A A of Fig. 3,

when actuated by its lever-arm 26, and to prevent the longitudinaldisplacement of said shaft, a screw or pin 2? is inserted in an openingof the flange and passes into the groove as illustrated in Figs. 3 anda.

Designated by 28 is a spring, which is secured at one end to the head 10at 28, said spring bearing at its other extremity against the under sideof the base of the lever-arm or handle 26, as illustrated in Figs. 3 and4:.

As will appear from the illustrations just mentioned, when the shaft 25is rotated by its lever-arm 26 to the position shown in Fig. 3 the crankor wrist-pin 25 of said shaft, which is inserted in the slot 23, willturn the lever 22 upon its pivot and cause the detent 22 to enter thedesired locking-notch 20 of index-ring 15, and to prevent accidentalrelease of said shaft, and consequently the pawl, either by centrifugalforce or by gravity, the spring 28 is provided, said spring bearing atits free end upon aslightly-flattened base 29 of the lever-arm or handle26, as illustrated in Figs. 3 and 5.

Designated in a general way by the numeral 31 is a carrier in the shapeof a slide titted upon ways of the bed, and on this carrier is mountedfor angular adjustment a frame 32, in which is journaled a shaft 33,carrying a I milling-cutter 34L for operating upon the stock,

this construction being that illustrated in my application aforesaid andbeing but one of many that could be employed in connection with myimproved indexing mechanism.

Other means may be provided for locking the indexing device and forsecuring the same against accidental displacement without departure fromthe invention, which is not limited to the precise details shown foraccomplishing these results.

In operation my improved machine works as follows: Stock (designated by30 and shown in dotted lines in Fig. 1) is inserted into spindle 11 andchuck 18 and is supported on the dead center 8, the chuck being thencompressed upon the stock by screwing the internally-threaded cap 19upon said spindle 11. Frame 32 is then adjusted to set the cutter to thedesired angle with relation to the stock, and the carrier 31 is actuatedby common means (not shown) to move said cutter along the stock. When itis necessary to index the stock, lever 26 is grasped and shaft 25 isrotated, the wrist-pin 25 of said shaft actuating lever 22 and raisingits detent 22 out of the notch 20 of index-ring 15, in which it isseated. Shaft 11 is then turned to bring another notch 20 beneath thedetent 22 and the lever-arm 26 is grasped and thrown down, thus forcingthe detent into the notch of the ring in line with it, spring 28 actingas a friction-brake to prevent movement of said parts, as above stated.

While a manually-actuated device is shown for rocking the shaft 25, theinvention is not limited thereto, for other means may be employed forthis purpose, if desired. So, too, other means may be used for lockingthe shaft 25 against displacement, the invention not being limited tothe spring shown.

Having thus described my invention, what 1 claim is 1. The combination,with an index-ring and a rotary support, of a device pivoted to thesupport and having a part adapted to engage said index-ring; a shaftcarried by the support and connected with said device; and means foractuating said shaft.

2. The combination, with a spindle, and with means for supporting thesame, of a notched index-ring secured to said spindle; a lever having adetent adapted to enter the notches of the index-ring, said lever beingpivoted to the support for the spindle and having a slot; a shaft havinga wrist-pin entering the slot of the lever; and an arm attached to saidshaft.

3. The combination, with a spindle, and with a rotary support for thesame if 'n index-ring secured to the spindle; a slotted lever pivoted tothe spindle-support and having a detent adapted to enter the notches ofsaid index-ring; a shaft journaled in the support and carrying awrist-pin entering the slot of the lever; a handle secured to the lever;and means for preventing the lever from displacemen't.

4:. The combination, with a tubular spindle and with means for rotatingthe same, of a chuck-spindle mounted in said tubular spindle; a notchedind ex-ring secured to the chuckspindle; a slotted lever having a detentadapted to enter the notches of the index-ring, said lever being pivotedto the head of the tubular spindle; a shaft having a wrist-pin enteringthe slot of said lever; a handle attached to said shaft; and a springsecured to the head of said tubular spindle and bearing against theshaft.

5. In a machine of the class specified, the combination, with a tubularlive-spindle, of

a tubular chuck-spindlefitted in said live.

spindle; an index-ring secured to the chuck spindle; a detent carried bythe live-spindle for engaging said index-ring; and means also carried bythe live-spindle for actuating said detent.

6. The combination, with a tubular spindle of a rotary spindlesurrounding the tubular spindle; an index-ring rigid with said tubularspindle; a pivoted detent carried by the rotary spindle; means alsocarried by the rotary spindle for actuating said detent; and a devicefor locking the detent-actuating means.

In testimony whereof I affix my signature in presence of two witnesses.

BENGT M. W. HANSON.

lVitnesses:

ARTHUR E. THAYER, ANGUS BALLARD.

ICC

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